A Neanderthal tooth was discovered in Serbia. This finding helps to fill gaps in the human fossil record of this important geographical region.

Richard ‘Bert’ Roberts, Vladimir Uliyanov and Maxim Kozlikin (clockwise from top) examining sediments in the East Chamber of Denisova Cave.
Institute of Archaeology and Ethnography of the Siberian Branch of the Russian Academy of Sciences, Author provided
January 30, 2019

How do scientists figure out when evolutionary events – like species splitting away from a common ancestor – happened? It turns out our DNA is a kind of molecular clock, keeping time via genetic changes.